Key fob



FIG. 1 is a perspective view of a key fob showing our new design;

FIG. 2 is a plan view thereof; and,

FIG. 3 is an elevational view thereof.

The broken line showing of the button and aperture is for illustrative purposes only and forms no part of the claimed design. The opposite face of the key fob is not shown and forms no part of the claimed design. 

The ornamental design for a key fob, as shown and described. 